Graphical user interface for a display screen or portion thereof



FIG. 1 is a front elevational view of a first image of a first embodiment of a graphical user interface for a display screen or portion thereof showing our new design;

FIG. 2 is a front elevational view of a second image thereof; and,

FIG. 3 is a front elevational view of a third image thereof.

The appearance of the image transitions sequentially between the images shown in FIGS. 1 and 2, FIGS. 2 and 3 and FIGS. 1 and 3. The process or period in which an image transitions to another forms no part of the claimed design. The broken line showing of a display panel or screen, and other elements forms no part of the claimed design. 

CLAIM The ornamental design for a graphical user interface for a display screen or portion thereof, as shown and described. 